Goodbye, New York. Adam Moss Is Leaving the Magazine He Has Edited for 15 Years.

Adam Moss, whose visual savvy and ear for the zeitgeist made him one of the leading magazine editors of his generation, said on Tuesday that he would step down from New York magazine, his canvas for the past 15 years.

The departure of Mr. Moss, the longest-serving editor in chief in the title’s half-century history, is another signal moment for an industry that has been transformed by the digital revolution. His last day will be in March, and in an interview he said he had no immediate plans beyond a long-delayed vacation.

“I’ve been going full throttle for 40 years; I want to see what my life is like with less ambition,” Mr. Moss said, sipping coffee last week in the kitchen of his West Village home. “I’m older than the staff. I’m older than the readers. I just want to do something new.”